Maggie I'd go on the third date but keep your wits about you and leave if he gets too full on. You can always make a decision after that date. Maybe he's just nervous? But he does sound very full on. Just don't give him any details like your address or where you work, just in case.
Scarey You definitely need to ask him about Tinder. Just say you noticed it on his phone so downloaded it yourself to see what it was about (maybe say a colleague said it was a hook up app or something) and you saw he'd been active on there. Then let him fill the silence. Or you could say you like the look of it and are going to start using it too 
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CanIHave Just leave it now and carry on as you were - if you keep mentioning it you'll just dig yourself into a deeper hole. In future, don't just talk about dating other men at the same time - do it! Then leave it up to the man to ask you to be exclusive and not date anyone else. Make him work to have you for himself.
Redundant I wouldn't get in a stranger's car or go to their house on the first date. I've been to someone's house on a second date but that was for a quick cup of tea at the end of the date, the date itself wasn't there. I think your friend needs to take more care of herself and certainly not give her address out to strangers and if she's going to their house, she needs to give their address to you, just in case.
White Have you heard from the police yet? I think what you're planning on telling him is ideal.
Well I managed not to reply to MCS's text at first but I feel so rude not replying to messages and I ignored his last one, so I text him back last night just saying I'd had a lovely Easter and a good week last week. He's replied this morning asking what was so good about my week, then put 'Has a fancy man swept you off your feet? xx' So, he's interested enough to want to know if I'm seeing someone else but not interested enough to date me? Haven't replied to that one yet, my (male) friend says to reply with something like 'Wouldn't you like to know?' to keep him guessing. I need to have a think.
As for my POF possibles, Mr Wallet came across as TOO keen - wants to meet up ASAP, will bring me Easter eggs, sent me a FB message saying 'Add me as a friend and I'll be yours for a long time xxx' 
. He sent me his number but I haven't sent him mine as I get the feeling I'd be inundated with texts and calls. Plus from his photos I don't fancy him at all. Mr Mwoop promised to add more photos to his profile as asked, which he duly did, but they look like they're of a completely different person! I can only conclude that photo 1 is somewhat ten years old.
I'm fed up of POF - had enough of it and just about ready to delete/hide my profile tbh. I'm just completely disillusioned with it all. Told my male friend about it and he suggested doing an evening class or new hobby instead, so I can meet men irl. So I'm looking into local running clubs as I like running but am completely out of practice. Men like running, right?!