Hello, I need some help to manage my live cluster!

I'm  currently running a cluster with 2 nodes, RF:2, CL:1.
Since I'm limited to hardware upgrade issues, I'm not able to increase my ConsitencyLevel for now.

Anyway,  I ran a full repair on each node of the cluster followed by a flush. Although I'm still reading old data when performing queries.

Well it's know that I might read old data during normal operations, but shouldnt it be sync after the full antientropy repair?
What I'm missing?

Thanks in advance!