Alexa ranking won't help you much in terms of site improvement, well it does in a way but having quality posts and traffic is the key to success, alexa rank will increase when your visitors increase but i don't think some redirecting sites affect your rank at all, on the other hand if you keep earning good traffic your alexa rank will improve eventually, don't keep an eye on alexa and stuff, competitiveness is not about alexa, it's all about keeping your blog active and posting new stuff every day while also trying to find a good niche that people search, good niches will get your tons of traffic and visitors!
Good luck and just ignore any traffic conflicts, if it is anything serious you should report it on the support team!
Happy blogging!