Outdrives?

[racingdwarf]

About 5 weeks ago I notice the original set of madmonkey outdrives were very worn to say the least, and the drive shafts were locking into them on power.they looked cheep and hadn't lasted long,So I changed them for the £20quid is X2c ones.
was working on the car last night and noticed that one outdrive was perfect for about 4 meeting old, the other was worn to buggery was as bad as the last type, maybe lasted even shorter amount of time.
Has anyone else had this sort of problem?to me the only thing I can think of is I had 2 types in the pack,one good quality, and one soft crap std one.

talking to my LHS it would seem that in the past few weeks they have had some problems with ansmann packing in kits etc,