I work as part of a small team. myself, and another colleague work very hard and deal with a certain amount of cases (it a sort of data entry). the third colleague has been doing very little which massively increased the work load for my colleague and myself increased as a result. I have provided reports which clearly who who does what, and evidenced the work load discrepancy.
our manager called a meeting with all of us to discuss a better share of the case load. However, lazy colleague, instead of admitting that she does not do much and agreeing to take up more, entered the meeting and said she did in fact 4x as much as the data shows but somehow, the system deleted her entries. Our line manager took her word (she has been working there many more years than me and my colleague) and clearly I and the other newer colleague are somewhat slow and we have been instructed to carry on as we did and to support lazy co-worker more since her work load is so much higher than presumed.
We are not sure what to do. Line manager will believe whatever lazy co-worker is saying and we feel really stupid for raising this issue. any thoughts? If I raise it again and point the fabricated numbers out, I will just look petty.