Dunelm Boston flat pack furniture - help!

[RosieLeaLovesTea]

DH and I have been building two small bedside tables with drawers since 8pm. We were
going great guns - following the instructions, built the frame and the drawers. However when coming to fit the drawers in the runners we have struggled for 2 hours. Because the drawers do not fit on the runners. They are either wonky and slide off the back, or if we get the bottom draw on there is a gap between the drawer and the frame! Plus the top drawer would
not fit in the space. We have tried changing the runners around several
times to ensure they are on correctly. We cannot work out where we have gone wrong?

Sorry wanted to ask if anyone has this furniture and had similar problems?

What you describe sounds like what happens if I pull a drawer completely out then don't engage it properly on the runners when I put it back in, so it's sitting on top of the runners instead of slotting into the gap between the two lips of the runner.

Hard to explain, but it could just be that you're not offering up the drawer to the runners in the right way.