Without providing full labs for all we know your TT/FT levels may very well be too high on such protocol 160 mg/week (80 mg every 3.5 days)!
How long have you been on such protocol and where did your hematocrit sit pre-trt?
When one uses exogenous testosterone.....T----->will increase hemoglobin/hematocrit within the first month and can take up to 9-12 months to reach peak levels.....mind you most end up donating blood well before this.
Any time T dose is increased (tweaking protocol) it will again lead to increased hemoglobin/hematocrit.
Lowering T dose which will result in bringing down TT/FT levels will have a big impact on lowering hematocrit.
I would not change your protocol until you get full labs to see where your TT/FT levels sit on such dose.
Also remember that donating to frequently will result in crashing ferritin which is all too common with many men on trt.
Smartest thing to do is if ones TT/FT levels are to high on such T dose than simply lower dose to bring down TT/FT levels which will have a major impact on lowering hematocrit.