Also on the same topic, if i used a NPN Transistor with 1k resistor from the output pin to the relay signal will it help in anyway?
I had a second look at the module. Unfortunately there is no schematic. I would never work with a board like this with no schematic, unless I could make one my self from probing the board.
It does seem like the relay coils are driven directly from the digital outputs. We can not see the back of the board. Does it have clamping diodes on it, and/or transistor drivers? If not, driving it directly from the Arduino outputs will be a disaster due to back EMF spikes from the relay coil. This is a separate issue from the total current limitation.
Unfortunately, there are a lot of vendors/manufacturers that don't diligently document and represent their products. In the old days, techs and engineers would spot the gaping holes in a spec sheet like this, laugh the product off the block and find a better one. Also, because of this, it is increasingly difficult to train people to read a proper sheet, and what to look for.