I can't get the right color filtration.

brbo said:

You seem to be using quite small pieces of paper for your test prints and I doubt those can even be fitted properly let alone stay in proper position inside the drum with all the pouring in/out of chemicals and drum rotation that is happening

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That's a very good point; the paper often has a tendency to come off the walls of the tube and to start floating around freely inside the tank, especially if smaller scraps of paper are used. If there's not much chemistry in the tank (which is typical when using drums), it's likely that the paper doesn't get processed evenly.
Another contributing problem can be if the drum is not properly light tight, e.g. because part of the light trap is missing. E.g. in Jobo paper drums, there's a cup attached to the cap that is an essential part of the light trap. If this is missing, light will enter the tank when the lid is removed for pouring chemistry in or out.

I second Koraks' suggestion. I use Bellini RA4 in tray at room temp regularly with very very good results, and it avoids all the problems with cleaning the drums and avoiding contamination. I also second the suggestion to make tests with a full image, at leas in the beginning, it will help you immensely to see what is going on. Also the unexposed white borders are quite useful to have as they can be indicators of other factors (chemical contamination, light contamination...)

To prevent streaks, you could try pre-wetting the paper by using some tempered water before developer.