Id say drop your TM
When you say you hit your required numbers do you mean that you hit 5 on 5's week, 3 on 3's week and 1 on 1's week? if so your TM is too high.
Plug the numbers into a 1 rep calculator and you will find that each week you really should be aiming for AT LEAST 2 more just to break even with your current one rep max
Also remember your TM is lower than your one rep max so again which equates to more reps.
So if you are only hittin 5 3 and 1 on the + sets and you also couldnt do the widow maker set in one go, this all points towards the TM being set too high.